Mortar Based on Dune Sand and Substitute Wood Sawdust: Physico-Mechanical Characterization and Relationship Between Properties in Young Age

Abstract

The South of Algeria is known for these immense sand dunes, which cover part of its territory (Sahara). The main objective of this study is the recovery of sands dune and wood waste (sawdust). The latter, which constitutes a potential source of several environmental and economic problems. The objective of this present work is to characterize the physico-mechanical properties at a young age of a dune sand-based mortar lightened by wood waste and to examine the suitability of using it for various applications in the construction of buildings. The improvement of the characteristics of these sands, which essentially formed of sand untapped to date and with the sole aim of enhancing this national sand wealth. The formulation of the mixtures is based on the substitution of dune sand by sawdust, at different weight contents 0, 10, 20 and 30%. The quantity of cement is fixed at 450 g. The results obtained show firstly that the introduction of sawdust improves the characteristics of the mixture (grain size tends to be spread out, reduction in densities), and secondly the physico-mechanical characteristics, especially at 30% substitution (reduction absorption by total immersion of 20.50%, porosity of 28.32%, wet density of 1.73% and dry density of 14.94% and increase in tensile strength of 61.43% and in compression of 63.87%). The effect of sawdust on the relationships between the properties of mortars was clearly noted either for the relationships between early strengths or between compressive and tensile strengths.

Characterisation of lightweight concrete blocks made from dune sand and wood chips

“…The waste considered in this work is wood chips from carpentry waste. The recovery of dune sand and the reuse of wood chips in the construction sector have been the subject of several research projects in recent years (Bensaada et al, 2023;Silouantonda et al,2023;Jawad et al, 2022;Huijuan et al, 2022;Simon et al, 2022;Ziqiang et al, 2022;Emmanuel et al, 2021;Aidoud et al, 2021;M'Li et al, 2017;Bederina et al, 2010) aimed at their influence on the physicomechanical properties of the concretes and mortars thus obtained. In this sense, our work represents a continuation of this work and aims to extend the use of these materials in the prefabrication of concrete blocks.…”

Effect of the Incorporation of Recycled Rubber Aggregates on the Behavior of Self-Compacting Concrete

“…The recovery of natural materials and the recycling of waste are an effective way to deal with the economic and ecological constraints of recent years [8,9].…”